Upwelling conditions off the Oregon coast

The movie below shows development of upwelling on 15 June 2001. Surface particles are released in the model simultaneously in a large area on the shelf (approximately 60 by 120 km). Winds are southward during this time.

Question 1: Where does surface water go?

Question 2: Cold water (shown in blue) replaces warm water (red) near the coast. Where does the cold water come from?